*{
    padding: 0;
    margin: 0;
}
.area{
    text-align: center;
    padding: 50px 0;
}
ul{
    border: 1px solid red;
    display: inline;
    border-radius: 15px;
    background-color: hsla(0,0%,100%,.3);
}
li{
    width: 13px;
    height: 13px;
    display: inline-block;
    list-style-type: none;
    background-color: rgba(0, 0, 255, 0.71);
    margin: 0 5px;
    border-radius: 5px;
    cursor: pointer;
}